Hello, I am new to the site. I am currently constructing a quail pen and I had a few questions about the design. I am making a 5 ft wide pen. 2/3 of the pen would be open with chicken screening on floor and front of pen. The other 1/3 of the pen is going to be completely boxed for warmth and nesting. A six inch hole will be drilled through the side so that the quail can go from side to side. Now my question is on the boxed side.. Can the floor be solid wood or should I also put the screen material so the droppings fall through? I live in New Jersey and winters can get as low as maybe 15 degrees plus wind chill. Any help would be greatly appreciated.. Thanks!